I also took the integrated reasoning section during my GMAT. I can tell you right now that you want to AVOID IT AT ALL COSTS. I will not be surprised at all when Quant scores take a dive due to test takers having been run through a half hour battery of confusing and mentally taxing Integrated Reasoning before even getting to quant. At least with AWA you can basically zone in and just fill in the requisite phrases to get a good score. There's also no way of knowing at this point how seriously schools will start scoring the integrated reasoning section, but however they do it won't be good. If they give it serious weight like Q/V, then there's another section you have to devote serious time to studying. If they don't, well guess what? You're still going to be mentally smoked when you get to quant, and don't even begin to talk about how you'll feel during verbal. Especially because you know in that case it'll still be one of those AWA type sections, where your score can only hurt you.
Take it now and be glad when next June, July, August you read people on these forums pulling their hair out over their bad scores.